add connection-scoped context navigation

(cherry picked from commit bf89691b3f)

docs/plugin-api-additions/contexts.md

@@ -0,0 +1,24 @@
+# Connection and context navigation
+
+`get_connections()` returns one Connection snapshot per live connection:
+`id`, `network`, `server`, `context`. Connection IDs distinguish simultaneous
+connections with identical names. Prefer its server-tab context where present.
+`get_connection(context=None)` finds the owner of a live context.
+
+`get_contexts(connection_id=None, types=None)` lists live contexts, optionally
+filtered by connection ID (or a Connection object) and session types: server=1,
+channel=2, query=3. `connection.contexts(types=None)` is a convenience method.
+`find_context_by_id(connection_id, channel=None)` / `connection.find(channel)`
+resolve using that connection's IRC comparator; no channel selects the server tab.
+Missing/closed contexts return None. Existing find_context() remains unchanged.
+
+These helpers use the existing channels list's ID/context fields, so no new C
+context ABI is needed. Snapshots are not persistent IDs across client restarts;
+refresh them after closing/recreating connections. Always check Context.set()
+when explicitly selecting a context that might have closed.
+
+```python
+connection = zoitechat.get_connection()
+for context in connection.contexts(types=(2,)):
+    context.prnt('A channel on this exact connection')
+```

docs/plugin-api-additions/filters.md

@@ -1,24 +0,0 @@
-# Core-filtered hooks
-
-Python: `hook_server_filtered(name, callback, userdata=None, priority=PRI_NORM,
-connection_id=None, channel=None)` and `hook_print_filtered(...)`.
-Callbacks match the existing attrs variants: `(word, word_eol, userdata, attrs)`.
-The connection ID distinguishes duplicate names; None/-1 means any connection
-(including connection ID zero). A channel restriction uses that connection's
-IRC comparator. None means any context; an empty string is an exact restriction.
-
-C: the corresponding zoitechat_hook_*_filtered functions accept
-`(ph, name, pri, flags, connection_id, channel, callback, userdata)`;
-flags=0, ID=-1 for any and NULL channel for any. Check
-`get_info("api_context_filters")` for "1" before accessing the new Windows slots.
-
-Filtering takes place before Python/interpreter entry. Existing unrestricted
-hooks, priority, EAT semantics and unload/unhook handling are unchanged.
-Filters refer to the core-selected context, not an IRC target parsed from the
-line: unknown queries/channels can still have a server-tab context, and QUIT
-has its usual single server-hook context. Connection IDs last only this process.
-
-```python
-zoitechat.hook_print_filtered('Channel Message', callback,
-                             connection_id=zoitechat.get_prefs('id'), channel='#zoitechat')
-```

plugins/python/_zoitechat_contexts.py

@@ -0,0 +1,75 @@
+"""Navigate live connections by ID instead of ambiguous server/network names."""
+from collections import namedtuple
+import operator
+import _zoitechat as api
+
+__all__ = ['Connection', 'get_connections', 'get_connection', 'get_contexts',
+           'find_context_by_id']
+
+
+class Connection(namedtuple('_Connection', 'id network server context')):
+    __slots__ = ()
+
+    def contexts(self, types=None):
+        return get_contexts(self.id, types)
+
+    def find(self, channel=None):
+        return find_context_by_id(self.id, channel)
+
+
+def _id(connection):
+    return operator.index(connection.id if isinstance(connection, Connection) else connection)
+
+
+def get_connections():
+    """Return one snapshot per live connection, including disconnected ones."""
+    entries = api.get_list('channels')
+    by_id = {}
+    order = []
+    for entry in entries:
+        if entry.id not in by_id:
+            order.append(entry.id)
+        if entry.id not in by_id or entry.type == 1:
+            by_id[entry.id] = Connection(entry.id, entry.network, entry.server,
+                                         entry.context)
+    return [by_id[connection_id] for connection_id in order]
+
+
+def get_connection(context=None):
+    """Find the owning connection of a Context; return None when it has closed."""
+    context = context or api.get_context()
+    for entry in api.get_list('channels'):
+        if entry.context == context:
+            for connection in get_connections():
+                if connection.id == entry.id:
+                    return connection
+    return None
+
+
+def get_contexts(connection_id=None, types=None):
+    """Return contexts, optionally restricted to a connection and session types."""
+    if connection_id is not None:
+        connection_id = _id(connection_id)
+    if types is not None:
+        types = frozenset(types)
+    return [entry.context for entry in api.get_list('channels')
+            if (connection_id is None or entry.id == connection_id)
+            and (types is None or entry.type in types)]
+
+
+def find_context_by_id(connection_id, channel=None):
+    """Resolve a live context on exactly one connection; None selects its server tab."""
+    connection_id = _id(connection_id)
+    previous = api.get_context()
+    try:
+        for entry in api.get_list('channels'):
+            if entry.id != connection_id:
+                continue
+            if channel is None:
+                if entry.type == 1:
+                    return entry.context
+            elif entry.context.set() and api.nickcmp(entry.channel, channel) == 0:
+                return entry.context
+    finally:
+        previous.set()
+    return None

plugins/python/_zoitechat_filters.py

@@ -1,36 +0,0 @@
-"""Context restrictions evaluated by core before entering Python."""
-import operator
-import _zoitechat as api
-from _zoitechat_embedded import ffi, lib
-
-__all__ = ['hook_server_filtered', 'hook_print_filtered']
-
-
-def _register(name, callback, userdata, priority, connection_id, channel, server):
-    if not callable(callback):
-        raise TypeError('callback must be callable')
-    connection_id = -1 if connection_id is None else operator.index(connection_id)
-    if connection_id < -1 or connection_id > 2147483647:
-        raise ValueError('connection_id must fit the C API; -1 means any')
-    plugin = api.__get_current_plugin()
-    hook = plugin.add_hook(callback, userdata)
-    register = lib.zoitechat_hook_server_filtered if server else lib.zoitechat_hook_print_filtered
-    dispatch = lib._on_server_attrs_hook if server else lib._on_print_attrs_hook
-    handle = register(lib.ph, name.encode(), priority, 0, connection_id,
-                      ffi.NULL if channel is None else channel.encode(), dispatch, hook.handle)
-    if handle == ffi.NULL:
-        hook.is_unload = True
-        plugin.remove_hook(id(hook))
-        raise RuntimeError('unable to install filtered hook')
-    hook.zoitechat_hook = handle
-    return id(hook)
-
-
-def hook_server_filtered(name, callback, userdata=None, priority=api.PRI_NORM,
-                         connection_id=None, channel=None):
-    return _register(name, callback, userdata, priority, connection_id, channel, True)
-
-
-def hook_print_filtered(name, callback, userdata=None, priority=api.PRI_NORM,
-                        connection_id=None, channel=None):
-    return _register(name, callback, userdata, priority, connection_id, channel, False)

src/common/plugin.c

@@ -99,9 +99,6 @@ struct _zoitechat_hook
 	int tag;				/* for timers & FDs only */
 	int type;			/* HOOK_* */
 	int pri;	/* fd */	/* priority / fd for HOOK_FD only */
-	int connection_filter;
-	char *channel_filter;
-	gboolean context_filtered;
 };
 
 struct _zoitechat_list
@@ -354,8 +351,6 @@ plugin_add (session *sess, char *filename, void *handle, void *init_func,
 		pl->zoitechat_emit_print_attrs = zoitechat_emit_print_attrs;
 		pl->zoitechat_event_attrs_create = zoitechat_event_attrs_create;
 		pl->zoitechat_event_attrs_free = zoitechat_event_attrs_free;
-		pl->zoitechat_hook_server_filtered = zoitechat_hook_server_filtered;
-		pl->zoitechat_hook_print_filtered = zoitechat_hook_print_filtered;
 
 		/* run zoitechat_plugin_init, if it returns 0, close the plugin */
 		if (((zoitechat_init_func *)init_func) (pl, &pl->name, &pl->desc, &pl->version, arg) == 0)
@@ -626,15 +621,6 @@ plugin_hook_run (session *sess, char *name, char *word[], char *word_eol[],
 
 		hook = list->data;
 		next = list->next;
-		if (hook->context_filtered &&
-			(!is_session (sess) ||
-			 (hook->connection_filter != -1 && hook->connection_filter != sess->server->id) ||
-			 (hook->channel_filter && sess->server->p_cmp (hook->channel_filter, sess->channel))))
-		{
-			list = next;
-			continue; /* filter in C before entering an interpreter */
-		}
-
 		hook->pl->context = sess;
 
 		/* run the plugin's callback function */
@@ -1038,45 +1024,10 @@ zoitechat_unhook (zoitechat_plugin *ph, zoitechat_hook *hook)
 
 	g_free (hook->name);	/* NULL for timers & fds */
 	g_free (hook->help_text);	/* NULL for non-commands */
-	g_free (hook->channel_filter);
-	hook->channel_filter = NULL;
 
 	return hook->userdata;
 }
 
-static zoitechat_hook *
-plugin_add_filtered_hook (zoitechat_plugin *ph, const char *name, int pri,
-                         int flags, int connection_id, const char *channel,
-                         int type, void *callback, void *userdata)
-{
-    zoitechat_hook *hook;
-    if (flags != 0 || connection_id < -1 || !name || !callback)
-        return NULL;
-    hook = plugin_add_hook (ph, type, pri, name, NULL, callback, 0, userdata);
-    hook->context_filtered = TRUE;
-    hook->connection_filter = connection_id;
-    hook->channel_filter = g_strdup (channel);
-    return hook;
-}
-
-zoitechat_hook *
-zoitechat_hook_server_filtered (zoitechat_plugin *ph, const char *name, int pri,
-                               int flags, int connection_id, const char *channel,
-                               zoitechat_serv_attrs_cb *callback, void *userdata)
-{
-    return plugin_add_filtered_hook (ph, name, pri, flags, connection_id, channel,
-        HOOK_SERVER_ATTRS, callback, userdata);
-}
-
-zoitechat_hook *
-zoitechat_hook_print_filtered (zoitechat_plugin *ph, const char *name, int pri,
-                              int flags, int connection_id, const char *channel,
-                              zoitechat_print_attrs_cb *callback, void *userdata)
-{
-    return plugin_add_filtered_hook (ph, name, pri, flags, connection_id, channel,
-        HOOK_PRINT_ATTRS, callback, userdata);
-}
-
 zoitechat_hook *
 zoitechat_hook_command (zoitechat_plugin *ph, const char *name, int pri,
 						  zoitechat_cmd_cb *callb, const char *help_text, void *userdata)
@@ -1236,9 +1187,6 @@ zoitechat_get_info (zoitechat_plugin *ph, const char *id)
 		return text_find_format_string (e);
 	}
 
-	if (strcmp (id, "api_context_filters") == 0)
-		return "1";
-
 	hash = str_hash (id);
 	/* do the session independant ones first */
 	switch (hash)

src/common/zoitechat-plugin.h

@@ -206,18 +206,6 @@ struct _zoitechat_plugin
 #endif
 
 
-/* api_context_filters=1: connection_id -1 is any; NULL channel is any. */
-zoitechat_hook *zoitechat_hook_server_filtered (zoitechat_plugin *ph,
-    const char *name, int pri, int flags, int connection_id, const char *channel,
-    int (*callback) (char *word[], char *word_eol[],
-                     zoitechat_event_attrs *attrs, void *userdata),
-    void *userdata);
-
-zoitechat_hook *zoitechat_hook_print_filtered (zoitechat_plugin *ph,
-    const char *name, int pri, int flags, int connection_id, const char *channel,
-    int (*callback) (char *word[], zoitechat_event_attrs *attrs, void *userdata),
-    void *userdata);
-
 zoitechat_hook *
 zoitechat_hook_command (zoitechat_plugin *ph,
 		    const char *name,
@@ -437,8 +425,6 @@ zoitechat_pluginpref_list (zoitechat_plugin *ph,
 #define zoitechat_hook_server ((ZOITECHAT_PLUGIN_HANDLE)->zoitechat_hook_server)
 #define zoitechat_hook_server_attrs ((ZOITECHAT_PLUGIN_HANDLE)->zoitechat_hook_server_attrs)
 #define zoitechat_hook_print ((ZOITECHAT_PLUGIN_HANDLE)->zoitechat_hook_print)
-#define zoitechat_hook_server_filtered ((ZOITECHAT_PLUGIN_HANDLE)->zoitechat_hook_server_filtered)
-#define zoitechat_hook_print_filtered ((ZOITECHAT_PLUGIN_HANDLE)->zoitechat_hook_print_filtered)
 #define zoitechat_hook_print_attrs ((ZOITECHAT_PLUGIN_HANDLE)->zoitechat_hook_print_attrs)
 #define zoitechat_hook_timer ((ZOITECHAT_PLUGIN_HANDLE)->zoitechat_hook_timer)
 #define zoitechat_hook_fd ((ZOITECHAT_PLUGIN_HANDLE)->zoitechat_hook_fd)